Just for the heck of it check out his site at www.melevsreef.com, you will be amazed. He really knows what he is doing.
I'll check it out, just looks like a closed lop canister design (without the canister).
Overflows usually allow the water to do just that. Overflow into a pipe of container. A suction bar below the surface is not an overflow but I will check it out. I might learn somthing new today...
Edit, I can't seem to find where he has that picture, care to link me to it?
